Any blu-ray player that has built-in DivX playback should be able to play your MTS file.

You will see the DivX logo on the box and possibly the blu-ray player itself. Sometimes they include Xvid and MPEG-4 playback too.

Here in Canada you can buy a blu-ray player with built-in DivX/Xvid/MPEG-4 playback ability for as little as $60. I prefer the LG brand of blu-ray players as they use very good DivX/Xvid/MPEG-4 hardware decoders to play these types of files.

A "standard" blu-ray player will NOT play any of these files, the player has to be branded with the DivX / Xvid / MPEG-4 logos to be sure.